Grid Energy Storage Integration Patent Landscape 2026
Grid Energy Storage Integration Patent Landscape in 2026
Grid energy storage integration is in a confirmed growth phase, with 292 patent families on file and a 48% rise in recent-window activity; the University of Toronto holds the leading position with 23 patent families, and the field remains moderately concentrated, with universities and specialist firms sharing the top tier. Power supply and grid systems (H02J) dominates the technology mix, while adjacent branches in EV integration, digital commerce platforms, and solar generation represent comparatively sparse filing territory.
University of Toronto leads a moderately concentrated field
The University of Toronto heads the top five filers account for 27% of the combined output of the hundred largest filers, indicating moderate concentration with no single entity achieving lock-in.
A clear two-tier structure is visible: the top three applicants hold 59 patent families between them, while all applicants from rank four onward hold ten or fewer. This tier gap suggests the leaders have meaningful head starts in core grid-system IP, though the gap is not insurmountable.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | University of Toronto (Governing Council) | 23 | |
| 2 | EleapPower Ltd | 20 | |
| 3 | NextPower LLC | 16 | |
| 4 | 10644137 Canada Inc | 10 | |
| 5 | Huawei Digital Power Technologies Co. Ltd | 9 | |
| 6 | Nextracker LLC | 8 | |
| 7 | State Grid Corporation of China | 7 | |
| 8 | ELECTRIC POWER PLANNING & ENG INST CO LTD | 7 | |
| 9 | GE Energy Power Conversion Technology Ltd (GB) | 6 | |
| 10 | Unirac Inc | 6 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Indian Institute of Technology Kharagpur | 5 | |
| 12 | Economic Research Institute of State Grid Gansu Electric Power | 5 | |
| 13 | North China Electric Power University | 5 | |
| 14 | NextPower LLC (US) | 4 | |
| 15 | State Grid Gansu Electric Power Corp | 4 | |
| 16 | Nextracker Inc | 4 | |
| 17 | China Electric Power Research Institute Co. Ltd | 4 | |
| 18 | Zhongneng Zhixin Technology Industrial Development Co. Ltd | 4 | |
| 19 | Georgia Tech Research Corporation | 4 | |
| 20 | Hitachi Energy Ltd | 4 |
The presence of a Canadian university at the apex, flanked by specialist commercial entities and Chinese state-affiliated institutes in the lower ranks, signals that the field is still being shaped by a mix of academic invention and industrial scale-up — a pattern typical of an early-to-mid growth stage where no dominant commercial incumbent has yet consolidated.
The most recent 18–24 months of filing data are subject to publication lag and are likely under-counted; apparent activity levels for 2025–2026 should be treated as a lower bound. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity is rising and power-grid systems dominate the technology mix
The annual filing trend and IPC composition together reveal a field in active expansion, anchored firmly in electrical grid and power conversion engineering, with secondary clusters emerging in digital management and vehicle integration.
Annual filing trend
Annual filings climbed from 7 in 2017 to 43 in 2018, then oscillated before resuming an upward path through 2023–2025. The lifecycle evidence confirms annual filings are still rising; the 2025 and 2026 bars are understated by publication lag and should not be read as a ceiling. The 48% recent-window growth figure corroborates genuine expansion.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (Power supply and grid systems) accounts for the large majority of IPC records, confirming that core grid integration — energy dispatch, grid-tied storage, and power flow management — is the dominant engineering focus. H02M (power conversion) and B60L (EV propulsion) form the next largest clusters, reflecting the growing overlap between storage, inverter technology, and vehicle charging infrastructure. G06Q (business and data processing) appears at roughly the same scale as B60L, pointing to an emerging layer of digital platform and energy-market IP sitting alongside the hardware core.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Wave energy power generation and flywheel energy s…
Provided includes: a wave energy power generation device; a flywheel energy storage device; a flywheel state-of-charge calculation module; and an energy management module, and when the wave energy power generation device is in the power generation cycle, the power of the electric energy does not meet the grid power specification of the power grid, and the… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Intelligent photovoltaic interface and system | 58 |
| 2 | 一种风/光/储系统的物理建模系统 | 41 |
| 3 | Constant current fast charging of electric vehicle… | 34 |
| 4 | 一种可调节负荷的配电网规划策略优化方法及系统 | 28 |
| 5 | Constant current fast charging of electric vehicle… | 26 |
| 6 | Energy storage solution for an MRI system | 23 |
| 7 | 一种基于风光储一体化的智能微电网能源管理系统 | 20 |
| 8 | Systems and methods of DC power conversion and tra… | 20 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural dimensions — maturity, concentration, collaboration, and geography — each carry distinct implications for teams deciding where and how to enter or expand in grid energy storage integration.
Growth stage: expanding activity, not yet consolidated
The lifecycle evidence places grid energy storage integration firmly in the Growth stage, with annual filings still rising and a 48% uplift in the recent multi-year window. The field has not yet entered the saturation or consolidation phase, meaning foundational IP positions can still be established. Teams entering now face active but not yet entrenched competition.
Growth stageModerate concentration with a visible tier gap
The top five filers hold 27% of the combined output of the hundred largest filers, and the top three together account for 59 patent families — a meaningful lead over the remaining ranked applicants. This tier gap is notable but not prohibitive; no single entity has achieved the kind of dominance typical of a mature, incumbent-led field. Challengers with focused portfolios in adjacent sub-domains can still build differentiated positions.
Moderate concentrationUniversity–industry co-filing is the dominant collaboration pattern
The most active co-filing partnership is the University of Toronto with Havelaar Canada Industrial R&D Laboratories Ltd (13 co-filed families), which alone accounts for a substantial share of the top applicant’s portfolio. A secondary cluster links the University of Toronto with EleapPower Ltd (4 families). On the industrial side, Nextracker LLC co-files with NextPower LLC (6 families) and with Nextracker Inc (4 families), and the Electric Power Planning and Engineering Institute co-files with Zhongneng Zhixin Technology Industrial Development Co. (3 families), as does State Grid Corporation of China with the China Electric Power Research Institute (3 families). The ecosystem is therefore characterized by tight bilateral partnerships rather than broad consortia.
Bilateral partnershipsChina and India lead filing volume; PCT and EPO routes provide international reach
China is the lead jurisdiction by a significant margin, followed by India and the United States. Europe (EPO) and WIPO (PCT) provide international coverage channels. The strong India presence is notable and reflects active filing by Indian academic and individual inventors. Japan and Germany hold comparatively small footprints, suggesting limited defensive coverage in those markets from current leaders — a potential vulnerability or entry point depending on strategic objectives.
China-led, India-activeGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| University of Toronto (Governing Council) | Havelaar Canada Industrial R&D Laboratories Ltd | 13 |
| Nextracker LLC | NextPower LLC | 6 |
| University of Toronto (Governing Council) | EleapPower Ltd | 4 |
| Nextracker LLC | Nextracker Inc | 4 |
| Nextracker Inc | NextPower LLC | 4 |
| Electric Power Planning and Engineering Institute Co. Ltd | Zhongneng Zhixin Technology Industrial Development Co. Ltd | 3 |
| State Grid Corporation of China | China Electric Power Research Institute Co. Ltd | 3 |
| State Grid Corporation of China | State Grid Shanghai Municipal Electric Power Co. | 2 |
| Electric Power Planning and Engineering Institute Co. Ltd | Xi’an Jiaotong University | 1 |
| State Grid Corporation of China | Jiangsu Fangcheng Electric Science and Technology Co. Ltd | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
University of Toronto and EleapPower lead; Nextracker entities show recent deceleration
The top tier is anchored by two entities with distinct profiles: an academic institution with an industry partner driving battery-charging and grid-supply IP, and a commercial storage specialist. Momentum signals vary sharply across the ranking.
University of Toronto
The University of Toronto leads with 23 patent families, concentrated in H02J 7 (battery charging and grid supply) and H02J 15 (energy storage for grid), with a notable secondary focus in B60S 5 (vehicle servicing infrastructure tied to charging). The momentum signal shows a ‘new entrant’ trajectory in the recent window, suggesting the university’s grid storage filing activity is a relatively recent strategic push rather than a legacy position. Its closest collaboration partner, Havelaar Canada Industrial R&D Laboratories Ltd, shares 13 co-filed families, indicating the portfolio is substantially co-developed.
patent families: 23EleapPower Ltd
EleapPower Ltd holds 20 patent families, placing it second in the ranking. While direct applicantMomentum and applicantTech data are not broken out separately for EleapPower in the evidence, its co-filing relationship with the University of Toronto (4 shared families) suggests a commercialization-oriented partnership aligned with the leader’s H02J-focused portfolio. As a specialist commercial entity, EleapPower’s position as a close second to an academic leader indicates it may be the primary commercialization vehicle for university-originated IP in this space.
patent families: 20| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| University of Toronto (Governing Council) | 4 | ▲ new entrant |
| Nextracker LLC | 6 | ▼ -57% |
| Nextracker Inc | 2 | ▼ -86% |
| Huawei Digital Power Technologies Co. Ltd | 3 | ▲ new entrant |
| Electric Power Planning and Engineering Institute Co. Ltd | 5 | ▲ new entrant |
| State Grid Corporation of China | 2 | ▲ new entrant |
Under-served adjacent branches in digital platforms, EV integration, and solar generation
Several IPC branches sit adjacent to the dominant H02J core with comparatively sparse filing density. These represent areas where technical overlap with grid storage is plausible but existing patent coverage is thin relative to the scale of the primary branch.
G06Q · Digital commerce and energy-market data platforms
G06Q (business, commerce, and administrative data processing) accounts for 47 IPC records — roughly 6% of the total IPC record count — making it the largest of the sparse adjacent branches. The technical case for overlap is strong: grid storage at scale increasingly requires energy-market participation, demand-response contracting, and grid-service monetization platforms, all of which fall under G06Q. Filing density here remains low relative to the H02J core, and no single applicant has established a dominant position in this sub-domain. Teams with software and energy-market expertise could use this branch to build differentiated IP around storage dispatch optimization and ancillary-service bidding.
Search this in Eureka →B60L · Electric vehicle grid integration and vehicle-to-grid (V2G)
B60L (electric vehicle propulsion) accounts for 46 IPC records, also at 6% of the total IPC record count, and represents a technically adjacent area with high strategic relevance. Vehicle-to-grid (V2G) and bidirectional EV charging are direct extensions of grid energy storage integration, yet the B60L coverage in this corpus remains sparse relative to the core H02J cluster. The University of Toronto and Havelaar Canada Industrial R&D Laboratories Ltd have already signaled interest here through their B60S/B60L co-filings, but the broader V2G IP landscape within this corpus appears underdeveloped. Entry requires expertise spanning power electronics, grid interconnection standards, and EV charging protocols.
Search this in Eureka →How leaders differ by technology route across H02J sub-classes and adjacent branches
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | H02J 7 · Power supply & grid systems | G06Q 50 · Business, commerce & admin data processing | H02M 3 · Power conversion (AC/DC etc.) | H02M 7 · Power conversion (AC/DC etc.) |
|---|---|---|---|---|---|
| University of Toronto (Governing Council) | Moderate · 6 | Strong · 21 | Absent | Emerging · 4 | Strong · 11 |
| Nextracker LLC | Strong · 20 | Strong · 14 | Absent | Absent | Absent |
| Nextracker Inc | Strong · 16 | Strong · 9 | Absent | Absent | Absent |
| Havelaar Canada Industrial R&D Laboratories Ltd | Absent | Strong · 11 | Absent | Emerging · 2 | Strong · 6 |
| GE Energy Power Conversion Technology Ltd (GB) | Absent | Strong · 5 | Absent | Strong · 5 | Strong · 5 |
| Electric Power Planning and Engineering Institute Co. Ltd | Strong · 7 | Absent | Moderate · 2 | Absent | Absent |
Frequently asked questions
The evidence covers 292 patent families in scope globally. This corpus spans the topic of grid energy storage integration and forms the basis for all ranking, trend, and technology composition analysis in this report.
The University of Toronto (Governing Council) leads with 23 patent families, followed by EleapPower Ltd (20) and NextPower LLC (16). The top five applicants together account for 27% of the combined output of the hundred largest filers.
The field is in the Growth stage. Annual filings are still rising, and the recent multi-year window shows 48% growth. The most recent 18–24 months of data are subject to publication lag and are likely under-counted, so apparent 2025–2026 levels represent a lower bound.
China is the lead jurisdiction by filing volume, followed by India and the United States. Europe (EPO) and WIPO (PCT) provide international coverage channels. Japan and Germany have comparatively limited coverage from current leaders, which may represent a gap for internationally oriented entrants.
H02J (power supply and grid systems) is overwhelmingly dominant across the corpus. H02M (power conversion) and B60L (electric vehicle propulsion) form the next largest clusters. G06Q (business and data processing) is notable as a growing digital-platform adjacent branch.
The strongest co-filing relationship is between the University of Toronto and Havelaar Canada Industrial R&D Laboratories Ltd, with 13 co-filed patent families. Nextracker LLC and NextPower LLC share 6 co-filed families. The University of Toronto also co-files with EleapPower Ltd (4 families). State Grid Corporation of China co-files with the China Electric Power Research Institute (3 families).
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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